jdk8-mips64-public/hotspot: src/share/vm/memory/tenuredGeneration.hpp@ddce0b7cee93

8072383: resolve conflicts between open and closed ports
Summary: refactor close to remove references to closed ports
Reviewed-by: kvn, simonis, sgehwolf, dholmes

     1 /*

     2  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_MEMORY_TENUREDGENERATION_HPP

    26 #define SHARE_VM_MEMORY_TENUREDGENERATION_HPP

    28 #include "gc_implementation/shared/cSpaceCounters.hpp"

    29 #include "gc_implementation/shared/gcStats.hpp"

    30 #include "gc_implementation/shared/generationCounters.hpp"

    31 #include "memory/generation.hpp"

    32 #include "utilities/macros.hpp"

    34 // TenuredGeneration models the heap containing old (promoted/tenured) objects.

    36 class ParGCAllocBufferWithBOT;

    38 class TenuredGeneration: public OneContigSpaceCardGeneration {

    39   friend class VMStructs;

    40  protected:

    42 #if INCLUDE_ALL_GCS

    43   // To support parallel promotion: an array of parallel allocation

    44   // buffers, one per thread, initially NULL.

    45   ParGCAllocBufferWithBOT** _alloc_buffers;

    46 #endif // INCLUDE_ALL_GCS

    48   // Retire all alloc buffers before a full GC, so that they will be

    49   // re-allocated at the start of the next young GC.

    50   void retire_alloc_buffers_before_full_gc();

    52   GenerationCounters*   _gen_counters;

    53   CSpaceCounters*       _space_counters;

    55  public:

    56   TenuredGeneration(ReservedSpace rs, size_t initial_byte_size, int level,

    57                     GenRemSet* remset);

    59   Generation::Name kind() { return Generation::MarkSweepCompact; }

    61   // Printing

    62   const char* name() const;

    63   const char* short_name() const { return "Tenured"; }

    64   bool must_be_youngest() const { return false; }

    65   bool must_be_oldest() const { return true; }

    67   // Does a "full" (forced) collection invoked on this generation collect

    68   // all younger generations as well? Note that this is a

    69   // hack to allow the collection of the younger gen first if the flag is

    70   // set. This is better than using th policy's should_collect_gen0_first()

    71   // since that causes us to do an extra unnecessary pair of restart-&-stop-world.

    72   virtual bool full_collects_younger_generations() const {

    73     return !CollectGen0First;

    74   }

    76   virtual void gc_prologue(bool full);

    77   virtual void gc_epilogue(bool full);

    78   bool should_collect(bool   full,

    79                       size_t word_size,

    80                       bool   is_tlab);

    82   virtual void collect(bool full,

    83                        bool clear_all_soft_refs,

    84                        size_t size,

    85                        bool is_tlab);

    86   virtual void compute_new_size();

    88 #if INCLUDE_ALL_GCS

    89   // Overrides.

    90   virtual oop par_promote(int thread_num,

    91                           oop obj, markOop m, size_t word_sz);

    92   virtual void par_promote_alloc_undo(int thread_num,

    93                                       HeapWord* obj, size_t word_sz);

    94   virtual void par_promote_alloc_done(int thread_num);

    95 #endif // INCLUDE_ALL_GCS

    97   // Performance Counter support

    98   void update_counters();

   100   // Statistics

   102   virtual void update_gc_stats(int level, bool full);

   104   virtual bool promotion_attempt_is_safe(size_t max_promoted_in_bytes) const;

   106   void verify_alloc_buffers_clean();

   107 };

   109 #endif // SHARE_VM_MEMORY_TENUREDGENERATION_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/memory/tenuredGeneration.hpp@ddce0b7cee93

src/share/vm/memory/tenuredGeneration.hpp